Abstract #4997

Fast full-wave patient-specific field simulations in seconds with MARIE 2.0

Georgy Guryev¹, Eugene Milshteyn^2,3, Ilias I Giannakopoulos^4,5, Elfar Adalsteinsson^1,6,7, Lawrence L. Wald^2,3,7, and Jacob K White¹

¹Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States, ²Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA, United States, ³Harvard Medical School, Boston, MA, United States, ⁴Center for Advanced Imaging Innovation and Research (CAI2R), Department of Radiology, New York University Grossman School of Medicine, New York, NY, United States, ⁵The Bernard and Irene Schwartz Center for Biomedical Imaging (CBI), Department of Radiology, New York University Grossman School of Medicine, New York, NY, United States, ⁶Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, United States, ⁷Harvard-MIT Division of Health Sciences Technology, Cambridge, MA, United States

Synopsis

It was recently demonstrated that the combination of fast low-resolution tissue mapping and fast voxel-based field simulation can be used to perform a patient-specific MR safety check in minutes[4,5].However,field simulation required several of those minutes,making it too slow to perform the dozens of simulations that would be needed for patient-specific optimization.In this abstract we describe a compressed-perturbation-matrix technique that nearly eliminates the computational cost of including complex coils (or coils+shields) in voxel-based field simulation of tissue,thereby reducing simulation time from minutes to seconds.The approach is demonstrated on a wide variety of head+coil and head+coil+shield configurations,using the latest implementation of MARIE2.0.

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